A new inspection method for plasma facing components
Transient thermography testing is an established method for testing the joint quality of CFC tiles in metallic heat sink systems. With this method hot pressurized water is introduced into the cooling channels of the elements and the transient heating of the CFC surface is recorded by an infrared camera. CFC tiles with a lack of bonding can be detected since they heat more slowly than well joined tiles. To perform this inspection a water flow in the tubes must be established and therefore the connection of the component to a hot water circuit is necessary. A new approach to this inspection problem is the application of lock-in thermography. With this method periodic illumination with powerful lamps of the CFC surface causes periodic heating of the CFC material. The phase shift between the periodic surface temperature evolution and the periodically operating heat source is recorded and evaluated. The locking thermography can be applied immediately after joining of the tiles to the component because the presence of a cooling channel system is not required for the application of this method. The method is suited to test the bonding of CFC tiles onto the component and the integrity of CFC tiles regarding possible internal cracks.
Bibliographic Reference: An article published in: Physica Scripta. Vol. T111, 203�205, 2004
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Record Number: 200417782 / Last updated on: 2004-11-10
Original language: en
Available languages: en